rule win_mirai_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.mirai."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mirai"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { e8???????? 50 8d4c2420 e8???????? 8bcd e8???????? 56 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   50                   | push                eax
            //   8d4c2420             | lea                 ecx, [esp + 0x20]
            //   e8????????           |                     
            //   8bcd                 | mov                 ecx, ebp
            //   e8????????           |                     
            //   56                   | push                esi

        $sequence_1 = { ffd2 53 e8???????? 8a442417 83c408 5e 5d }
            // n = 7, score = 100
            //   ffd2                 | call                edx
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8a442417             | mov                 al, byte ptr [esp + 0x17]
            //   83c408               | add                 esp, 8
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp

        $sequence_2 = { ebc5 8bc3 c1f805 8d3c85c0877400 8bf3 83e61f c1e606 }
            // n = 7, score = 100
            //   ebc5                 | jmp                 0xffffffc7
            //   8bc3                 | mov                 eax, ebx
            //   c1f805               | sar                 eax, 5
            //   8d3c85c0877400       | lea                 edi, [eax*4 + 0x7487c0]
            //   8bf3                 | mov                 esi, ebx
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6

        $sequence_3 = { ff750c ff7508 ff75f8 ff15???????? 8985ecfbffff 83bdecfbffff00 752b }
            // n = 7, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   8985ecfbffff         | mov                 dword ptr [ebp - 0x414], eax
            //   83bdecfbffff00       | cmp                 dword ptr [ebp - 0x414], 0
            //   752b                 | jne                 0x2d

        $sequence_4 = { ff750c ff7508 6a01 8b4df0 e8???????? 8365fc00 8b45f0 }
            // n = 7, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   6a01                 | push                1
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   e8????????           |                     
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_5 = { ff750c e8???????? 59 8b08 8b4004 8b55ec 890a }
            // n = 7, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   8b55ec               | mov                 edx, dword ptr [ebp - 0x14]
            //   890a                 | mov                 dword ptr [edx], ecx

        $sequence_6 = { ff75c8 8b856cfaffff 83c068 50 68???????? 68???????? 68b4030000 }
            // n = 7, score = 100
            //   ff75c8               | push                dword ptr [ebp - 0x38]
            //   8b856cfaffff         | mov                 eax, dword ptr [ebp - 0x594]
            //   83c068               | add                 eax, 0x68
            //   50                   | push                eax
            //   68????????           |                     
            //   68????????           |                     
            //   68b4030000           | push                0x3b4

        $sequence_7 = { 8d45e8 50 8b4de4 83c124 e8???????? 50 8d4df0 }
            // n = 7, score = 100
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   83c124               | add                 ecx, 0x24
            //   e8????????           |                     
            //   50                   | push                eax
            //   8d4df0               | lea                 ecx, [ebp - 0x10]

        $sequence_8 = { ff30 e8???????? 59 8b45f8 832000 8b45f8 83600400 }
            // n = 7, score = 100
            //   ff30                 | push                dword ptr [eax]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   832000               | and                 dword ptr [eax], 0
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   83600400             | and                 dword ptr [eax + 4], 0

        $sequence_9 = { ff2485d4714800 837f0800 750b c7070c000000 e9???????? 83fe10 7323 }
            // n = 7, score = 100
            //   ff2485d4714800       | jmp                 dword ptr [eax*4 + 0x4871d4]
            //   837f0800             | cmp                 dword ptr [edi + 8], 0
            //   750b                 | jne                 0xd
            //   c7070c000000         | mov                 dword ptr [edi], 0xc
            //   e9????????           |                     
            //   83fe10               | cmp                 esi, 0x10
            //   7323                 | jae                 0x25

    condition:
        7 of them and filesize < 7086080
}